Speed Six Rebuild: Power 4.3 or 4.5?

[Incognegro]

More useful info, can a 3.9 diff setup be ported to a cerbera with the same results? Could be me going back to Power and asking for the most cost effective way to get 400 genuine bhp. I'm thinking that would be speccing the standard 4.0 to S with larger injectors and a bespoke map??

Wonder how that will effect the bank balance?

[tail slide]

Thought I'd post that for info my STR8SIX 4.2 engine (virtually same as 4.3) has now covered 30k miles inc competition and many trackdays, still sweet as a nut and suitably rampant power right up to 7k.

[Raffaele]

I would like to know if the rebuilt 4.0 engines have 360 hp or are they more powerful?

[Don1]

A good 4.0 will be sub 400bhp, you need to work on the breathing to go above that figure.

[glow worm]

Don1 said:

A good 4.0 will be sub 400bhp, you need to work on the breathing to go above that figure.

A long way below 400 bhp , I think mouth to mouth would be required .

[s6boy]

If longevity and drivability were taken out of the equation it would be interesting what could be extracted.